Thermo Scientific I-Chem® 1" x 7" Custody Seals for Environmental Sample Containers provide complete chain-of-custody and tamper evidence for samples from the point of collection to lab receipt. I-Chem Custody Seal adhesive stickers securely seal your sample bottle and cannot be peeled off. The only way to open the sealed bottle is to break the paper label. Includes a writing area for custody signature and date for tamper-evident security. Apply at the point of sample collection, and ship samples to their destination with confidence. 100/pack.